eclipse建立maven項目時，JDK版本默認是1.5

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如果你用eclipse建立maven項目時，新建的項目往往JDK版本很低——1.5！怎麼辦？修改settings.xml文件，增加profile節點，如下所示： 

	<profile>  
		<id>jdk-1.8</id>  
		<activation>  
			<activeByDefault>true</activeByDefault>  
			<jdk>1.8</jdk>  
		</activation>  
		<properties>  
			<maven.compiler.source>1.8</maven.compiler.source>  
			<maven.compiler.target>1.8</maven.compiler.target>  
			<maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>  
		</properties>  
	</profile>

<profile>    
    <id>jdk-1.6</id>    
    <activation>    
        <activeByDefault>true</activeByDefault>    
        <jdk>1.6</jdk>    
    </activation>    
    <properties>    
        <maven.compiler.source>1.6</maven.compiler.source>    
        <maven.compiler.target>1.6</maven.compiler.target>    
        <maven.compiler.compilerVersion>1.6</maven.compiler.compilerVersion>    
    </properties>    
</profile>  

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<?xml version="1.0" encoding="UTF-8"?>

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">

  <localRepository>D:/Program Files (x86)/java/repository</localRepository>

  <pluginGroups>
  </pluginGroups>

  <proxies>
  </proxies>

  <servers>
  </servers>


  <mirrors>
     <mirror>
      <id>UK</id>
      <mirrorOf>central</mirrorOf>
      <name>UK Central</name>
      <url>http://repo1.maven.org/maven2/</url>
    </mirror>
  </mirrors>


  <profiles>
	<profile>  
		<id>jdk-1.8</id>  
		<activation>  
			<activeByDefault>true</activeByDefault>  
			<jdk>1.8</jdk>  
		</activation>  
		<properties>  
			<maven.compiler.source>1.8</maven.compiler.source>  
			<maven.compiler.target>1.8</maven.compiler.target>  
			<maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>  
		</properties>  
	</profile>   
  </profiles>

</settings>

完整settings.xml文件配置如下：

<?xml version="1.0"?>  
<settings>  
    <mirrors>  
        <mirror>  
            <id>nexus</id>  
            <name>local private nexus</name>              
            <url>http://10.10.10.149:8081/nexus/content/groups/public</url>  
              
            <!--  
            http://caucho.com/m2  
            <url>http://www.ibiblio.net/pub/packages/maven2</url>  
            <url>http://ftp.cica.es/mirrors/maven2</url>  
            <url>http://www.freesky.com.cn/nexus/content/groups/public</url>  
            <url>http://10.10.10.141:8081/nexus/content/groups/public</url>  
            <url>http://192.168.132.10:8081/nexus/content/groups/public</url>  
            -->                            
            <mirrorOf>*</mirrorOf>  
        </mirror>  
    </mirrors>  
    <servers>   
        <server>  
            <id>nexus-releases</id>  
            <username>wangyl9</username>  
            <password>123456</password>  
        </server>  
        <server>  
            <id>nexus-snapshots</id>  
            <username>wangyl9</username>  
            <password>123456</password>  
        </server>  
        <server>  
            <id>tomcat6-manager</id>  
            <username>admin</username>  
            <password>admin</password>  
        </server>  
    </servers>  
    <profile>    
        <id>jdk-1.6</id>    
        <activation>    
            <activeByDefault>true</activeByDefault>    
            <jdk>1.6</jdk>    
        </activation>    
        <properties>    
            <maven.compiler.source>1.6</maven.compiler.source>    
            <maven.compiler.target>1.6</maven.compiler.target>    
            <maven.compiler.compilerVersion>1.6</maven.compiler.compilerVersion>    
        </properties>    
    </profile>  
      
</settings> 

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